Ore-feeder.



E. A. WALL.

ORE FEEDER- APPLICATION FILED 11511.2, 1911.

991,677. Patented May 9;; 1911.

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To all whom it may concern:

UNITED STATES PATENT OFFICE.

ENOS A. WALL, OF SALT LAKE CITY, UTAH.

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Specification of Letters Patent.

Patented May 9, 1911.

, Application filed March 2, 1911. Serial No. 611,908.

' plunger will be forced slowly forward to feed the oreand then given aquick return movement.

A further object of the invention is to,

provide means for regulating the length of stroke of the plunger, andalso to regulate v the force of its return movement.

or washer 0, while in rear of the These objects I accomplish by theconstruction shown in the accompanying drawing, in which-the figure is asectional side elevation of a feeder containing my improvements. I p

A designates a frame provided with a hopper A, for the material to befed. The bottom of the hopper inclines down to the outlet chute A v c B,designates an inclined plunger working across the outlet at the chute A,to push out through the chute the material descending thereon, as shownin the drawing.

The plunger rod, B, passes rearwardly through a guide G mounted on. theframework, and 1s rovided in front thereof with a bumping co ar 0,having a rubber facing guide'C the plunger rod is provided with a heretractin spring D, bearing against the guide an against a. hand-nut D,by means of which its tension may be regulated.- To the rear end of theplunger rod is connected by nuts 6, b, a vertlcally disposed yoke 13*,through the apertured opposite end of which yoke extends freely thethreaded outer plunger rod member B provided within the yoke with astrong helical spring 6 held between a collar or nut b, on the innerend. of the %lunger member B and the end of the yoke The plunger member13* is provided against the outer side of the yoke B with a handnut b byturning which the member B may be adjusted in and out oi the yoke toshorten or.len hen the plunger rod as.

a whole. The spring I) .is strong enough to hold the nut 6 against theyoke at all times so that there will be no relative movement during ,thereciprocation of the plunger; the

- purpose of the spring I) being to hold the parts rigidly connectedwhile at the same time permitting of adjustment of the member B by thenut b even when the machine is in operation. The lower bar of the yoke Bworks in a guide recess a, in a cross-bar A, of the. frame, which holdsit from turnmg.

The outer end of the plunger member B, is provided with a suitable head6, against which works the rotary cam E, mounted on a shaft E, having adriving pulley E.

It will be seen that I have provided a construction specially adapted tothe rapid feeding of ores, owing to the quick return of the plunger.This spring retract-ion, instead of retracting by an eccentric, of theplunger effects a more nearly continuous feed to the crusher, and thisreturn movement may be regulated while the machine is in operation, bythe hand-nut D. The amount fed by the plunger may be regulated byturning the nut b to lengthen or shorten the throw of the, plunger.

- he plunger rod is sectional and extensible so as to regulate the throwof the plunger, but its two sections are rigidly held against anyrelative movement except when the nut 6 is turned.

What I claim is:

1. The combination, with a hopper having between the member B and theyoke B member or section extending freely through the opposite end ofthe yoke, a spring on the inner end of the outer lunger rod member andbearing at one en against the inner side of the yoke, and at its otherend bearing against a part on the said outer section, a nut on the outerplunger rod section against the outerside of the yoke, by turning whichthe plunger rod may be lengthened or shortened, a retracting spring forthe plunger rod, and a cam enga the outer end of the plunger-rod to moveit-m against its retracting spring and suddenly release it.

2 The combination, with a hopper having .an outlet at its lower end, ofa plunger-working across said outlet, a two-part plunger rod, a guidefor the outer rod member, a bumper on the 'rod member to cushion itsinward movement, a retracting-spring on H said rod member, a nut on thesaid rod mem-' her to compress the spring against the outer side of theguide, a yoke-fixed to the'outer end of the inner rod-member and throughthe opposite end of which the opposite rod member freelypasses; a collaron theou'ter jecting-spring and suddenly release-it.

3. The combination, with a hopper having anoutlet, of a plunger workingacross said outlet, a sectional extensible plunger rod having a springtending normally to move the sections together, an adjustable nut on onesection holding it from inward movement by;the spring, on the othersection, and

In testimony whereof I affix my signature in presence of two witnesses.

ENOS A. WALL.

Witnesses:

R. M. PARKINs, GEO. H. EVANS.

said spring being strong enough to hold the rod-sections together towork as a single rod, 'and means for actuating the plunger rod.

